| 1 | /************************************************* |
| 2 | * Exim - an Internet mail transport agent * |
| 3 | *************************************************/ |
| 4 | |
| 5 | /* See the file NOTICE for conditions of use and distribution. */ |
| 6 | |
| 7 | /* GNU-specific code. This is concatenated onto the generic src/os.c file. |
| 8 | GNU/Hurd has approximately the same way to determine the load average as NeXT, |
| 9 | so a variant of this could also be in the generic os.c file. See the GNU EMacs |
| 10 | getloadavg.c file, from which this snippet was derived. getloadavg.c from Emacs |
| 11 | is copyrighted by the FSF under the terms of the GPLv2 or any later version. |
| 12 | Changes are hereby placed under the same license, as requested by the GPL. */ |
| 13 | |
| 14 | #ifndef OS_LOAD_AVERAGE |
| 15 | #define OS_LOAD_AVERAGE |
| 16 | |
| 17 | #include <mach.h> |
| 18 | |
| 19 | static processor_set_t default_set; |
| 20 | static int getloadavg_initialized; |
| 21 | |
| 22 | int |
| 23 | os_getloadavg (void) |
| 24 | { |
| 25 | host_t host; |
| 26 | struct processor_set_basic_info info; |
| 27 | unsigned info_count; |
| 28 | |
| 29 | if (!getloadavg_initialized) |
| 30 | { |
| 31 | if (processor_set_default (mach_host_self(), &default_set) == KERN_SUCCESS) |
| 32 | getloadavg_initialized = 1; |
| 33 | } |
| 34 | |
| 35 | if (getloadavg_initialized) |
| 36 | { |
| 37 | info_count = PROCESSOR_SET_BASIC_INFO_COUNT; |
| 38 | if (processor_set_info(default_set, PROCESSOR_SET_BASIC_INFO, &host, |
| 39 | (processor_set_info_t)&info, &info_count) != KERN_SUCCESS) |
| 40 | getloadavg_initialized = 0; |
| 41 | else |
| 42 | { |
| 43 | #if LOAD_SCALE == 1000 |
| 44 | return info.load_average; |
| 45 | #else |
| 46 | return (int) (((double) info.load_average * 1000) / LOAD_SCALE)); |
| 47 | #endif |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | return -1; |
| 52 | } |
| 53 | #endif /* OS_LOAD_AVERAGE */ |
| 54 | |
| 55 | /* End of os.c-GNU */ |